Test for module 4
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What is the chemical formula for water? | H2O
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| Electrolysis is | when you use electricity to break down a molecule into it's elements
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| Polar Molecule is | A molecule that has slight positive and negative charges
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| What is a Solvent | A liquid capable of dissolving other substances.
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| What is Solute | A substance that is dissolved in a solvent
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| Define Cohesion | it's when individual molecules are so strongly attracted to each other, that they tend to stay together even when there is tension.
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| What is hard water? | water that has certain dissolved ions in it, mainly calcium ions.
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| Some metals tend to absorb oxygen but not hydrogen. Suppose such a metal was covering the battery in an electrolysis experiment like in 4.1. Which is more likely erroneous result: h02 or h4o? | H4o
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| Why is water a liquid at room temperature when all other chemically similar substances are gases at room temperature? | Hydrogen bonding keeps the molecules close together
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| How many atoms are in one molecule of co2? How many atoms are in one molecule of CO? | There are 3 atoms in CO2, and and 2 in CO.
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| The principal component of gasoline is octane, whose molecules are composed of eight carbon atoms (c) and eighteen hydrogen atoms (H) What is the chemical formula? | C8H18
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| Why are water molecules polar? | because both the oxygen atoms and the hydrogen atoms are fighting over the electrons they are supposed to be sharing.
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| If a substance does not dissolve in water, is it ionic,polar, or nonpolar? | nonpolar
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| If a substance dissolves in water, will it dissolve in vegetable oil, a nonpolar substance? | it will not dissolve in vegetable oil
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| Is hard water the result in the city's water treatment process? | no, it is a result of calcium containing compounds from the region where it was taken.
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
sagedurbin
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